The controlled release of nuclear energy in a reactor is accomplished by allowing the critical mass of fuel to react controlling a chain reaction.
What is a nuclear reactor?
A nuclear reactor is a prepared place in which nuclear reactions can occur. The nuclear reactor often have a nuclear fuel in it. The reaction is a chain reaction hence it has the ability to sustain itself.
Now, the controlled release of nuclear energy in a reactor is accomplished by allowing the critical mass of fuel to react controlling a chain reaction.
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